English-Portuguese translations for countdown

contagem regressivaTal como a perspectiva de uma contagem regressiva para uma fatalidade jamais vista que atingirá as gerações vindouras, se a inaceitável situação presente se arrastar. As is the prospect of a countdown to unprecedented catastrophe for further generations if the present unacceptable situation continues.
retrocontagem

A count backward in fixed units to the time of some event, especially the launch of a space vehicle
A radio or television program counting down the top songs of a given week, usually in reverse order ending with the No. 1
To count down

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